Underground diaphragm wall structure for shield tunnel grinding pile to pass through

Abstract

The utility model discloses an underground diaphragm wall structure for a shield tunnel grinding pile to pass through. The underground diaphragm wall structure comprises an underground diaphragm wall reinforcement cage for pouring concrete, the diaphragm wall reinforcement cage comprises a plurality of reinforcement cage sub-bodies which are sequentially connected, the adjacent reinforcement cage sub-bodies are connected through connecting I-shaped steel, each reinforcement cage sub-body comprises an upper-section reinforcement cage body and a lower-section reinforcement cage body, and a middle-section reinforcement cage body which can be directly chiseled through is arranged between each upper-section reinforcement cage body and the corresponding lower-section reinforcement cage body. The connecting I-shaped steel comprises an upper section steel body and a lower section steel body, and a middle section steel body which can be directly chiseled through is arranged between the upper section steel body and the lower section steel body; the steel reinforcement cage body and the connecting I-shaped steel of the underground diaphragm wall steel reinforcement cage comprise three sections, the middle section steel reinforcement cage body and the middle section steel body which are used for chiseling away a shield tunnel portal can be directly cleared away when concrete of an underground diaphragm wall is broken away, then secondary clearing is not needed, and the chiseling-away efficiency of the shield tunnel portal is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of shield tunnel technology, and specifically to a diaphragm wall structure for the passage of grinding piles in shield tunnels. Background Technology

[0002] With the rapid development of transportation infrastructure construction, shield tunneling structures are frequently used in the construction of urban subways, highway tunnels, railway tunnels, and underwater tunnels in my country. During the construction of the shield launching or receiving end walls, diaphragm walls are often used as the retaining structure. Existing diaphragm walls typically use ordinary reinforced concrete structures with interlocking pipes and I-beam joints. Using interlocking pipe joints during diaphragm wall construction makes it difficult to control the construction quality at the joint locations and easily leads to water leakage at the joints. While using I-beam joints can improve the joint quality and effectively control water leakage, it increases the difficulty of subsequent shield portal excavation. Portal excavation is one of the key procedures for shield entry and exit, and its construction quality and safety directly affect the smooth progress of shield construction.

[0003] Traditional methods for removing tunnel portals involve using manual pneumatic picks or mechanical hammers during the launch or reception of the tunnel boring machine (TBM). However, after breaking through the concrete of the diaphragm wall, manual or mechanical removal of the exposed reinforcing steel bars within the diaphragm wall is required, which significantly reduces the efficiency of removing the TBM portal. Furthermore, this method presents numerous safety hazards and presents considerable difficulty, with sand and water surges frequently occurring during the excavation process, leading to portal collapses and other accidents. Utility Model Content

[0004] To address the aforementioned problems in the prior art, this utility model provides a diaphragm wall structure for the passage of piles in shield tunnels, which solves the problem that existing diaphragm walls require manual or mechanical removal of the reinforcing steel bars after the concrete is broken.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A diaphragm wall structure for piling in shield tunnels is provided, comprising a diaphragm wall reinforcement cage for pouring concrete; the diaphragm wall reinforcement cage comprises multiple sequentially connected reinforcement cage bodies, adjacent reinforcement cage bodies are connected by connecting I-beams, each reinforcement cage body comprises an upper reinforcement cage body and a lower reinforcement cage body, a middle reinforcement cage body that can be directly drilled through is provided between the upper and lower reinforcement cage bodies, and the connecting I-beams comprise an upper steel body and a lower steel body, a middle steel body that can be directly drilled through is provided between the upper and lower steel bodies.

[0007] Furthermore, both the upper and lower sections of the steel cage include multiple first transverse steel bars and multiple first vertical steel bars, with the multiple first transverse steel bars evenly fixed on the multiple first vertical steel bars.

[0008] Furthermore, the middle section of the steel cage includes multiple second transverse steel bars and multiple second vertical steel bars, with the multiple second transverse steel bars evenly fixed on the multiple second vertical steel bars;

[0009] One end of the second vertical reinforcing bar is connected to the bottom of the first vertical reinforcing bar on the upper section of the reinforcing cage via a connecting component, and the other end of the second vertical reinforcing bar is connected to the top of the first vertical reinforcing bar on the lower section of the reinforcing cage via a connecting component.

[0010] Furthermore, the connecting assembly includes a connecting clamp and a connecting plate, with the second vertical steel bar and the first vertical steel bar embedded in the connecting clamp, and the connecting clamp passing through the through hole reserved in the connecting plate and being fixed by a lock nut.

[0011] Furthermore, the second transverse reinforcement and the second vertical reinforcement are made of glass fiber.

[0012] Furthermore, the middle section of the steel body is connected to the upper section and the lower section of the steel body respectively through joint plates.

[0013] Furthermore, the middle section of the steel body is made of glass fiber.

[0014] This utility model discloses a diaphragm wall structure for use in shield tunnels with pile driving, the advantages of which are:

[0015] The steel cage and connecting I-beams of this utility model are both divided into three sections. The middle section of the steel cage and the middle section of the steel body used for tunneling the shield tunnel portal can be directly removed. Thus, when breaking the concrete of the diaphragm wall, the middle section of the steel cage and the middle section of the steel body can be directly broken, eliminating the need for manual or mechanical removal of the exposed steel bars in the diaphragm wall, which greatly improves the efficiency of tunneling the shield tunnel portal. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a diaphragm wall structure for use in shield tunnels with grinding piles.

[0017] Figure 2 This is a schematic diagram of the steel cage body of this utility model.

[0018] Figure 3 This is a top view of the upper section of the steel cage of this utility model.

[0019] Figure 4 This is a top view of the mid-section steel cage of this utility model.

[0020] Figure 5 This is a schematic diagram of the second vertical steel bar connection of this utility model.

[0021] Figure 6This is a schematic diagram of the second vertical steel bar connection of this utility model from another angle.

[0022] Figure 7 This is a schematic diagram of the connecting I-beam of this utility model.

[0023] Among them, 1. diaphragm wall reinforcement cage; 2. reinforcement cage body; 21. upper section reinforcement cage body; 22. middle section reinforcement cage body; 23. lower section reinforcement cage body; 24. first transverse reinforcement; 25. first vertical reinforcement; 26. second transverse reinforcement; 27. second vertical reinforcement; 3. connecting I-beam; 31. upper section steel body; 32. middle section steel body; 33. lower section steel body; 4. connecting components; 41. connecting clamp; 42. connecting plate; 43. lock nut; 5. joint plate. Detailed Implementation

[0024] The present invention is described in detail with respect to specific embodiments in order to enable those skilled in the art to understand the present invention. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, any changes that are within the spirit and scope of the present invention as defined and determined by the appended claims are obvious. All utility model creations utilizing the concept of the present invention are protected.

[0025] Example 1

[0026] This embodiment provides a diaphragm wall structure for use in shield tunnel pile driving. Its purpose is to solve the problem that existing diaphragm walls require manual or mechanical removal of the reinforcing steel bars after concrete removal. (Refer to...) Figures 1-7 The specific structure of this embodiment will be described in detail below.

[0027] A diaphragm wall structure for the passage of piles in a shield tunnel includes a diaphragm wall steel cage 1 for pouring concrete.

[0028] The diaphragm wall reinforcement cage 1 includes multiple reinforcement cage bodies 2 connected in sequence, and adjacent reinforcement cage bodies 2 are connected by connecting I-beams 3.

[0029] Specifically, the reinforcing cage 2 includes an upper reinforcing cage 21 and a lower reinforcing cage 23, with a middle reinforcing cage 22 that can be directly drilled between the upper reinforcing cage 21 and the lower reinforcing cage 23; the connecting I-beam 3 includes an upper steel body 31 and a lower steel body 33, with a middle steel body 32 that can be directly drilled between the upper steel body 31 and the lower steel body 33.

[0030] In this embodiment, adjacent steel cages 2 are connected by connecting I-beams 3 to form a diaphragm wall steel cage 1. The diaphragm wall steel cage 1 is then hoisted into the foundation pit and concrete is poured into it to form a continuous wall above ground.

[0031] Optionally, the rear end of the front section of the steel cage 2 is embedded in one end of the connecting I-beam 3 and welded together, while the front end of the rear section of the steel cage 2 is directly embedded in the other end of the connecting I-beam 3.

[0032] The diaphragm wall reinforcement cage 1 consists of three sections: the reinforcement cage body 2 and the connecting I-beam 3. The shield tunnel portal is located in the middle section of the reinforcement cage body 22 and the middle steel body 32. Both the middle reinforcement cage body 22 and the middle steel body 32 are made of materials that can be directly removed by manual pneumatic picks or mechanical hammers. Thus, when breaking the concrete of the diaphragm wall, the internal middle reinforcement cage body 22 and the middle steel body 32 can be directly broken, eliminating the need for manual or mechanical removal of the exposed reinforcement in the diaphragm wall, which greatly improves the removal efficiency of the shield tunnel portal.

[0033] Specifically, both the upper section of the reinforcing cage 21 and the lower section of the reinforcing cage 23 include multiple first transverse reinforcing bars 24 and multiple first vertical reinforcing bars 25, with the multiple first transverse reinforcing bars 24 evenly fixed to the multiple first vertical reinforcing bars 25. In this embodiment, the lap joints of the first vertical reinforcing bars 25 and the first transverse reinforcing bars 24 are fixed by welding.

[0034] Specifically, the middle section of the steel cage 22 includes multiple second horizontal steel bars 26 and multiple second vertical steel bars 27. The multiple second horizontal steel bars 26 are evenly fixed on the multiple second vertical steel bars 27. One end of the second vertical steel bar 27 is connected to the bottom of the first vertical steel bar 25 on the upper section of the steel cage 21 through the connecting component 4, and the other end of the second vertical steel bar 27 is connected to the top of the first vertical steel bar 25 on the lower section of the steel cage 23 through the connecting component 4.

[0035] Specifically, the connecting assembly 4 includes a connecting clamp 41 and a connecting plate 42. The second vertical steel bar 27 and the first vertical steel bar 25 are embedded in the connecting clamp 41, and the connecting clamp 41 passes through the through hole reserved in the connecting plate 42 and is fixed by the locking nut 43.

[0036] Specifically, the second horizontal reinforcing bar 26 and the second vertical reinforcing bar 27 are made of glass fiber.

[0037] In this embodiment, the second transverse steel bar 26 and the second vertical steel bar 27 in the middle section steel cage 22 are both made of glass fiber. The use of glass fiber reinforced second transverse steel bar 26 and second vertical steel bar 27 can directly break the middle section steel cage 22 located at the shield tunnel portal when breaking the concrete of the underground continuous wall, saving process steps.

[0038] The top end of the second vertical steel bar 27 on the middle section steel cage 22 and the bottom end of the first vertical steel bar 25 on the upper section steel cage 21 are both clamped and embedded in the connecting clamp 41. The two ends of the connecting clamp 41 pass through the connecting plate 42. The connecting plate 42 is fixed by the locking nut 43 on the connecting clamp 41, thereby fixing the second vertical steel bar 27 and the first vertical steel bar 25 and connecting the middle section steel cage 22 and the upper section steel cage 21.

[0039] The bottom end of the second vertical steel bar 27 on the middle section steel cage 22 and the top end of the first vertical steel bar 25 on the lower section steel cage 23 are both clamped and embedded in the connecting clamp 41. The two ends of the connecting clamp 41 pass through the connecting plate 42, and the connecting plate 42 is fixed by the locking nut 43 on the connecting clamp 41. The second vertical steel bar 27 and the first vertical steel bar 25 are fixed, and the middle section steel cage 22 and the lower section steel cage 23 are connected.

[0040] Specifically, the middle section steel body 32 is connected to the upper section steel body 31 and the lower section steel body 33 respectively through the joint plate 5.

[0041] Specifically, the material of the middle section steel body 32 is glass fiber.

[0042] In this embodiment, the connecting I-beam 3 includes an upper steel body 31, a middle steel body 32, and a lower steel body 33 from top to bottom. The middle steel body 32 is made of glass fiber so that when breaking the concrete of the underground continuous wall, the middle steel body 32 located at the shield tunnel portal can be directly broken, saving steps.

[0043] Both ends of the middle section steel body 32 are connected to the upper section steel body 31 and the lower section steel body 33 respectively through the joint plate 5. The joint plate 5 is a rectangular plate. The joint plate 5 is connected to the upper section steel body 31 and the lower section steel body 33 by welding. Several threaded holes are opened at the joint plate 5 and the middle section steel body 32 respectively. The joint plate 5 and the middle section steel body 32 are connected by inserting bolts into the corresponding threaded holes on the joint plate 5 and the middle section steel body 32. Then, the middle section steel body 32 is connected to the upper section steel body 31 and the lower section steel body 33 respectively through the joint plate 5.

[0044] Optionally, the threaded holes on the connector plate 5 are countersunk holes, and the bolt length does not exceed the sum of the thickness of the connector plate 5 and the thickness of the upper flange plate of the middle section steel body 32.

[0045] Although the specific embodiments of the utility model have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of this patent. Various modifications and variations that can be made by those skilled in the art without inventive effort within the scope described in the claims still fall within the scope of protection of this patent.

Claims

1. A diaphragm wall structure for use in shield tunnels with pile driving, characterized in that: It includes a diaphragm wall reinforcement cage (1) for pouring concrete; the diaphragm wall reinforcement cage (1) includes a plurality of reinforcement cage bodies (2) connected in sequence, and adjacent reinforcement cage bodies (2) are connected by connecting I-beams (3); The steel cage body (2) includes an upper steel cage body (21) and a lower steel cage body (23), and a middle steel cage body (22) that can be directly drilled is provided between the upper steel cage body (21) and the lower steel cage body (23); The connecting I-beam (3) includes an upper steel body (31) and a lower steel body (33), and a middle steel body (32) that can be directly drilled through is provided between the upper steel body (31) and the lower steel body (33).

2. The diaphragm wall structure for the passage of piles in a shield tunnel according to claim 1, characterized in that: The upper section of the steel cage (21) and the lower section of the steel cage (23) both include multiple first transverse steel bars (24) and multiple first vertical steel bars (25), with the multiple first transverse steel bars (24) evenly fixed on the multiple first vertical steel bars (25).

3. The diaphragm wall structure for the passage of piles in a shield tunnel according to claim 2, characterized in that: The middle section steel cage (22) includes multiple second transverse steel bars (26) and multiple second vertical steel bars (27), with the multiple second transverse steel bars (26) evenly fixed on the multiple second vertical steel bars (27); One end of the second vertical steel bar (27) is connected to the bottom of the first vertical steel bar (25) on the upper section of the steel cage (21) through the connecting component (4), and the other end of the second vertical steel bar (27) is connected to the top of the first vertical steel bar (25) on the lower section of the steel cage (23) through the connecting component (4).

4. The diaphragm wall structure for the passage of piles in a shield tunnel according to claim 3, characterized in that: The connecting assembly (4) includes a connecting clamp (41) and a connecting plate (42). The second vertical steel bar (27) and the first vertical steel bar (25) are embedded in the connecting clamp (41), and the connecting clamp (41) passes through the through hole reserved in the connecting plate (42) and is fixed by a locking nut (43).

5. The diaphragm wall structure for the passage of piles in a shield tunnel according to claim 3, characterized in that: The second transverse steel bar (26) and the second vertical steel bar (27) are made of glass fiber.

6. The diaphragm wall structure for the passage of piles in a shield tunnel according to claim 1, characterized in that: The middle section steel body (32) is connected to the upper section steel body (31) and the lower section steel body (33) respectively through the joint plate (5).

7. The diaphragm wall structure for the passage of piles in a shield tunnel according to claim 6, characterized in that: The material of the middle section steel body (32) is glass fiber.

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